Measurement system for aquatic environments comprising a surface vessel and a submersible device

A measurement system for aquatic environment, said system comprising:

• a surface vessel comprising
• at least one hull comprising a submerged portion configured to be located below a waterline, and
• a propulsion and guiding system;
• and
• an underwater machine comprising
• a hull,
• a propulsion system,
• a guiding system, and
• a plurality of sensors configured to take measurements,
• wherein the underwater machine is configured to be launched from the vessel to move on under water independently of the vessel during a remote-use phase, or stored into the vessel in a non-remote-use phase,
• the submerged portion of said at least one hull of the vessel comprises a recess configured to receive at least an upper portion of the hull of the underwater machine when the underwater machine is stored into the vessel, said recess being configured to be disposed entirely below the waterline so that the underwater machine remains completely submerged during storage of the underwater machine,
• wherein, when the underwater machine is stored in the vessel, the propulsion system of the underwater machine, when activated, takes part in the propulsion of the vessel.